Date Code 20010518 General Description 2-17
SEL-2020 Instruction Manual
“JOB DONE” EXAMPLE
To demonstrate the power and simplicity of the SEL-2020, set up the SEL-2020 to collect relay
meter data from an SEL-251 Relay as follows:
1. Connect the SEL-251 Relay to an SEL-2020 port; this example uses Port 1. Use the
SEL-C239 (Y type) cable because it handles both communication and IRIG-B. Connect the
communication terminal at the Y end of the cable to Port 2R on the SEL-251 Relay because
Port 2 on 200 series relays is capable of Fast Meter data transfer. Connect the IRIG-B
terminal at the Y end to the relay’s AUX Input port. Connect the single connector end of the
cable to Port 1 on the SEL-2020.
2. Access Level 2 on the SEL-2020 and issue the command SET P 1 to configure Port 1. The
SEL-2020 will prompt for the type of device connected to the port. Enter S for SEL IED, Y
to auto-configure the port, and press the <ENTER> key to confirm the configuration
prompts. The SEL-2020 will establish communication with the relay; determine the type of
relay, relay ID, and communication baud rate; and determine if the relay is capable of Fast
Meter. Enter Y to save port configuration changes at the final prompt.
3. Next, issue the command SET A 1 to set an auto-message to collect relay meter data.
Respond to prompts about saving unsolicited messages (AUTOBUF), the STARTUP string,
and operate command enable (SENDOPER). Press <ENTER> to confirm the defaults for all
of these. Enter 1 when prompted for the message count. At the ISSUE1 prompt, enter
P00:00:01 to set the message to trigger once every second. At the MESG1 prompt, enter
20METER to send the request for meter data to the SEL relay. Press <ENTER> to accept
the default for remaining settings and enter Y to save changes. As soon as the SEL-2020
accepts the setting change, the TXD and RXD Port 1 LEDs on the SEL-2020 will begin to
flash as the SEL-2020 requests and receives meter data every second.
4. Verify connection, configuration, and data transfer using SEL-2020 commands WHO, MAP,
VIEW, and STATUS as follows:
a) Verify that the relay is connected to the desired port and configured properly by
issuing the WHO command. The SEL-2020 responds to this command with some
basic information about the SEL-2020 and a list of the devices and device
identification strings associated with each port. In this case, the list shows that an
SEL-151 device is connected to Port 1. The report lists the “151” and not “251”
because the 151 firmware is used in both the 100 series and 200 series hardware
packages.
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